This fun - and frustrating (when your opponent gets on a hot streak) - classic game is in app form. The rules are the same: You try to put your cards in sequential order and empty your stockpile first.

$1.99 for iOS and Android (there is a free version, but users don't like it).

If you're looking for a fun non-card game, try this hot app. It's a strategy/combat game that has lots of people hooked. It's free to play, but if you want to be a superstar at this game, you'll probably need to buy items during gameplay.